sha512.h

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#ifndef _IPXE_SHA512_H
#define _IPXE_SHA512_H
 
/** @file
 *
 * SHA-512 algorithm
 *
 */
 
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
FILE_SECBOOT ( PERMITTED );
 
#include <stdint.h>
#include <endian.h>
#include <ipxe/crypto.h>
#include <ipxe/mdhash.h>
 
/** SHA-512 number of rounds */
#define SHA512_ROUNDS 80
 
/** An SHA-512 digest */
struct sha512_digest {
        /** Hash output */
        uint64_t h[8];
};
 
/** An SHA-512 data block */
union sha512_block {
        /** Raw bytes */
        uint8_t byte[128];
        /** Raw qwords */
        uint64_t qword[16];
        /** Final block structure */
        struct {
                /** Padding */
                uint8_t pad[112];
                /** Length in bits */
                struct {
                        /** High 64 bits (unused by iPXE) */
                        uint64_t hi;
                        /** Low 64 bits (unused by iPXE) */
                        uint64_t lo;
                } __attribute__ (( packed )) len;
        } final;
};
 
/** SHA-512 digest and data block
 *
 * The order of fields within this structure is designed to minimise
 * code size.
 */
struct sha512_digest_data {
        /** Digest of data already processed */
        struct sha512_digest digest;
        /** Accumulated data */
        union sha512_block data;
} __attribute__ (( packed ));
 
/** SHA-512 context size */
#define SHA512_CTX_SIZE MDHASH_CTX_SIZE ( struct sha512_digest_data )
 
/** SHA-512 block size */
#define SHA512_BLOCK_SIZE sizeof ( union sha512_block )
 
/** SHA-512 digest size */
#define SHA512_DIGEST_SIZE sizeof ( struct sha512_digest )
 
/** SHA-384 digest size */
#define SHA384_DIGEST_SIZE ( SHA512_DIGEST_SIZE * 384 / 512 )
 
/** SHA-512/256 digest size */
#define SHA512_256_DIGEST_SIZE ( SHA512_DIGEST_SIZE * 256 / 512 )
 
/** SHA-512/224 digest size */
#define SHA512_224_DIGEST_SIZE ( SHA512_DIGEST_SIZE * 224 / 512 )
 
extern void sha512_compress ( struct sha512_digest_data *dd,
                              const struct sha512_digest *digest );
 
/** Define a SHA-512 family digest algorithm */
#define SHA512_ALGORITHM( _name, _digest, _init, _digestsize )          \
        MDHASH_ALGORITHM( _name, _digest, sha512_compress,              \
                          __BIG_ENDIAN, struct sha512_digest_data,      \
                          _init, _digestsize )
 
extern struct digest_algorithm sha512_algorithm;
extern struct digest_algorithm sha384_algorithm;
extern struct digest_algorithm sha512_256_algorithm;
extern struct digest_algorithm sha512_224_algorithm;
 
#endif /* IPXE_SHA512_H */